Lock.



Patented June 13, 1911.

' A TTORNEY.

J. STRAKA & R. LEWIS.

LOOK.

APPLICATION FILED SEPT. 26, 1910.

MIWVWI S JOHN STRAKA AND RUDOLPH LEWIS, OF KANSAS CITY, MISSOURI.

LOCK.

Specification of Letters Patent.

Patented J nne 13, 1911.

Application filed September 26, 1910. Serial No. 583,824.

To all whom it may concern:

Be it known that we, JOHN STRAKA, a citizen of Austria, and RUDOLPHLEWIS, a citizen of the United States, residing at Kansas City, in thecounty of Jackson and State of Missouri, have invented certain new anduseful Improvements in Locks, of which the following is a specification.

1 (1)ur invention relates to improvements in The object of our inventionis to provide a lock which is simple in construction, cheap tomanufacture and which is diificult to pick.

The novel features of our invention are hereinafter fully described andclaimed.

In the accompanying drawings illustrative of the preferred form of ourinvention, Figure 1 is an elevation of one side of the lock, parts beingbroken away. In this view the bolt is shown in the locked position. Fig.2 is an elevation of the other side of the lock, parts being broken awayand the bolt being shown in the unlocked position. Fig. 3 is a verticalsection on the dotted line ab of Fig. 4. Fig. 4 is a vertical section onthe dotted line 0-d of Fig. 1. Fig. 5 is a side elevation of the keyemployed for manipulating the lock. Fig. 6 is a side View of one of thetumblers. Fig. 7 is a top view of the locking bolt.

Similar reference characters denote similar parts.

The drawings illustrate our invention applied to an ordinary form ofmortise lock of which 1 denotes the body of the casing to which issecured in the usual manner by a screw 2 a cover 3. The upper part ofthe casing may be provided with a chamber 4 in which are contained, ifdesired the ordinary latch bolt 5 together with the mechanism foroperating it.

The body 1 and cover 3 are respectively provided with parallel portionsor .walls 6 and 7 which serve as partitions for dividing the lower partof the easing into one inter mediate and two outer compartments denotedrespectively by 7 8 and 9. The outer compartments are respectivelyclosed by two covers 10 and 11 which serve as outer walls and which aresecured to the partitions 6 and 7 respectively by screws 12 and 13.Slidably mounted in the intermediate compartment 7 is a locking bolt 14which is provided at opposite sides with horizontal outwardly extendingprojections 15 which extend through slots 16 provided one in eachpartition 6 and 7. The partitions 6 and 7 are respectively provided ontheir outer sides with two cylindrical projections 17 on which arerespectively pivoted in the chambers or compartments 8 and 9 twotumblers 18 of the usual construction and function, and which areprovided each with a slot 19 the lower side of which is provided nearits opposite ends with recesses 20 and 21 which are adapted to receivetherein the adjacent projection 15 of the locking bolt 14 for holdingthe bolt in the locked and unlocked positions. The lower edge of thebolt 14 is provided with the usual notch 22 for receivjpg the bit of akey employed to move the The outer sides of the partitions 6 and 7 areprovided with bosses 23 having screw threaded holes for receiving thescrews 12 and 13 and which have respectively secured to them one set ofends of a pair of springs 23, which have their other set of ends bearingrespectively against the under edges of the tumblers 18 for forcing saidtumblers into engagement with the projections 15 of the bolt 14. Theouter sides of the partitions 6 and 7 are provided respectively with twobosses 24, preferably circular, and preferably extending to a positionalmost in contact with the inner sides of the outer walls 10 and 11. Thepartitions 6 and 7 are provided with keyholes 25 and 26 disposed so asto register with each other and respectively partially dividing thebosses 24, as shown in Fig. 4. The outer walls or covers 10 and 11 arealso provided with keyholes 27 and 28 which register with the keyholes25 and 26.

In Figs. 4 and 5 is best shown the form of key adapted to be employed tooperate the bolt 14. This key is provided with a stem 29 having a bitwhich is provided with two wards 30 adapted, when the key is placed inthe keyholes, as shown in Fig. 4 to receive therein the partitions 6 and7 which serve as wards. The wards 30 are provided each with lateralrecesses 31 adapted to respectively receive the bosses 24 so as topermit the turning of the key. The wards 30 divide the bit into anintermediate arm 32 and two outer arms 33. The arm 32 is adapted to beturned in the compartment 7 and engage with the bolt 14 in the notch 22.The arms 33 are adapted to be turned in the compartments 8 and 9 andrespectively engage and operate the tumblers 18 to release theprojections 15 from the recesses 20 and 21 to permit the unlocking andlocking movement of the bolt 14: actuated by the arm 32. 1 In theoperation of the invention, the key is inserted in the keyholes 25, 2627 and 28, as shown in Fig. 4. If the bolt 14L is in the unlockedposition shown in Fig. 2, the key is turned to the right, viewed in Fig.2, thereby causing the arms 33 to swing the tumblers 18 so as to releasethe projections 15 from the recesses 21. Following this the middle arm32 enters the notch 22 and forces the bolt let to the locked positionshown in Fig. 1. Continued turning of the key in the same directionpermits the arms 33 to pass from engagement with the tum blers 18 sothat the projections 15 enter the notches or recesses 20, therebyholding the bolt it locked.

By locating the tumblers 18 at the outer sides of the partitions 6 and 7and by providing the outer sides of said partitions with the bosses 2%,and by providing the two outer covers or walls 10 and 11, the lock isrendered extremely difficult to pick.

lVe do not limit our invention to the structure shown and described, asvarious modifications and changes in construction within the scope ofthe appended claims may be made without departing from the spirit of ourinvention.

Having thus described our invention, what we claim and desire to secureby Letters Patent, is

1. In a lock, a lock casing having front and rear walls and twopartitions parallel with each other and with said walls, and which withthe walls :torm three compartments, the two partitions each having alongitudinal slot, and the partitions and front and rear walls havingkeyholes registering with each other, a longitudinally slidable boltmounted in the middle compartment and provided at opposite sides withtwo projections which extend respectively through the slots in thepartitions, and two tumblers mounted respectively in the two outercompartments and respectively engaging said projections for holding thebolt locked and unlocked.

2. In a lock, a lock casing having front and rear walls and twopartitions parallel with each other and with the said walls, thepartitions with the walls forming three compartments, the partitionseach having on its outer side a boss, each partition having a,

longitudinal slot, and the partitions and front and rear walls havingkey holes which register with each other, the key holes in thepartitions partially dividing said bosses respectively, a longitudinallyslidable bolt mounted in the middle one of said compartments and havingat opposite sides projections which respectively extend through saidslots into the outer compartments, and two tumblers mounted respectivelyin said outer compartments and respectively engaging said projectionsfor holding the bolt locked and unlocked.

In a look, a lock casing having two parallel walls each having a slot,the walls having keyholes which register with each other, a slidablebolt located between said 1; ls and having two projections respectivelyextending through said slots, and two lers located respectively at theouter said walls and respectively engaging s' l projections for holdingthe bolt in the hacked and unlocked positions.

l a look, a lock casing having two lel walls each having a slot, thewalls 1g key holes which register with each each wall having on itsouter side a boss which is partially divided by the key hole in saidwall, a slidable bolt located between said walls and having twoprojections respectively extending through said slots, and two tumblerslocated respectively at the outer sides of said walls and respectivelyengaging said projections, for holding the bolt locked and unlocked.

$3. In a lock, a lock casing having two parallel walls each having aslot and each serving as a ward, the walls having key holes whichregister with each other, a slidable bolt mounted between the walls andhaving two projections extending respectively through said slots, twotumblers located respectively at the outer sides of said walls andrespectively engaging said projections for holding the bolt locked andunlocked, and a key insertible in said keyholes and provided with a bithaving two wards for receiving respectively the wards of the casing, thewards in the bit dividing the bit into two outer and intermediate armsfor respectively operating the tumblers and the bolt. 7 V

6. in a lock, a lock casing having two aarallel walls each having a slotand each serving as a ward and having onits outer side a boss, each wallhaving a keyhole partially dividing the boss on said wall andregistering with the keyhole of the other wall, and each wall having aslot, a slidable bolt located between said walls and having twoproject-ions respectively extending through said slots, two tumblerslocated respectively at the outer sides of said walls and respectivelyengaging said projections for holding the bolt locked and unlocked, anda key insertible in said keyholes and provided with a bit having twowards for respectively receiving the wards of the easing and adapted torespectively receive said r t sses, the wards in the bit dividing thebit into two outer and intermediate arms for respectively operating thetumblers and the bolt.

'4'. In a lock, a lock casing having front and rear walls and twoparallel partitions with form three compartments, the partitions servingas wards and having each a slot, the partitions and front and rear wallshaving keyholes which register with each other, a bolt slidably mountedin the middle compartment and having two projections respectivelyextending through said slots, two tumblers mounted respectively in theouter compartments and respectively engaging said projections forholding the bolt locked and unlocked, and a key insertible in saidkeyholes and having a bit provided with two wards for respectivelyreceiving said wards of the casing and dividing the bit into two outerand one intermediate arms adapted to respectively enter the outer andmiddle compartments for respectively operating the tumblers and thebolt.

8. In a. lock, a lock casing having front and rear walls and twoparallel partitions which form three compartments, the partitionsserving as wards and having each a slot, the partitions and front andrear walls having keyholes registering with each other, each partitionhaving on 1ts outer side a boss partially divided by the key hole insaid partition, a slidable bolt mounted in the compartment between thepartitions and having two projections respectively extend- 30 and a keyinsertible in said keyholes and 35 having a bit provided with two wardsfor respectively receiving the two partitions and the bosses thereon anddividing the bit into one intermediate and two outer arms adapted torespectively enter said compartments respectively for respectivelyengaging the two tumblers and the bolt for operating the same.

In testimony whereof we have signed our names to this specification inpresence of 45 two subscribing witnesses.

JOHN STRAKA. RUDOLPH LEWIS.

WVitnesses:

E. B. I-Iousn, FLORENCE M. VENDIG.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

